Cabbage-like α-Ni(OH)2 with a good long-term cycling stability and high electrochemical performances for supercapacitor applications

[Display omitted] •Cabbage-like nickel hydroxide was synthesized by electrodeposition method.•A maximum specific capacitance of 1903Fg−1 for an current density of 1mAcm−2.•This new material show 99.3% of their initial capacitance after 1000 cycles. Nanostructured Ni(OH)2 is a promising candidate to...

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Bibliographic Details
Published in:Chemical physics letters 2017-06, Vol.677, p.75-79
Main Authors: Aguilera, L., Leyet, Y., Peña-Garcia, R., Padrón-Hernández, E., Passos, R.R., Pocrifka, L.A.
Format: Article
Language:English
Subjects:
Cycling stability
Electrochemical impedance spectroscopy
Electrochemical performance
Electrodeposition
Supercapacitor
α-Nickel hydroxide
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Summary:[Display omitted] •Cabbage-like nickel hydroxide was synthesized by electrodeposition method.•A maximum specific capacitance of 1903Fg−1 for an current density of 1mAcm−2.•This new material show 99.3% of their initial capacitance after 1000 cycles. Nanostructured Ni(OH)2 is a promising candidate to be used as an extrinsic pseudocapacitors material. Here, nickel hydroxide (Ni(OH)2) was grown on the surface of a Ti plate, galvanostatically via electrodeposition method. In the electrodeposited films a stable α-Ni(OH)2 phase with particles in cabbage form and average crystallite size of 20nm is obtained. The α-Ni(OH)2 sample exhibits excellent electrochemical performance at different current densities and good cycling stability. A maximum specific capacitance of 1903Fg−1 is achieved at a current density of 1mAcm−2. The energy and power density values found are 42.31Whkg−1 and 430Wkg−1.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2017.03.084